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neeta

· started a discussion

· 1 Months ago

explain the answer (Question: 351218.0 )

why will the train take 2 hrs?

Question:

A train approaches a tunnel PQ. Inside the tunnel a dog located at a point that is three-eights of the distance PQ measured from the entrance P. When the train whistles, the dog runs. If the dog moves to the entrance of the tunnel P, the train catches the dog exactly at the entrance. If the dog moves to the exit Q, the train catches the dog at exactly the exit. The ratio of the speed of the train and the speed of the dog is -

Options:
A)

5 : 1

B)

4 : 1

C)

1 : 4

D)

5 : 2

Solution:

Ans: (b)


Arun Kumar

· commented

· 1 Months ago

Kyunki train jab P par pahunchta hai to dog ko 3 hrs lagta hai to jab dog Q k taraf jayega to 3 hrs tak to train P tak aa jayega uske bad 5-3 =2 hrs me both dog and train will reach at Q iska MATLAB PQ distance travel karne me train ko 2 hrs hi lagenge
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